Publications
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Oblique map of Loihi Seamount and Papa'u Landslide, Hawaii
No abstract available.
Authors
Tau Rho Alpha, J. M. Morley, C. E. Gutmacher, W.A. Austin
Test and calibration of the Digital World-Wide Standardized Seismograph
During the past decade there has been steady progress in the modernization of the global seismograph network operated by the U.S. Geological Survey (USGS). The World-Wide Standardized Seismograph Network (WWSSN) has been augmented by new stations with advanced instrumentation, including the Seismic Research Observatories (SRO) and the modified High-Gain Long-Period (ASRO) stations. One goal in the
Authors
Jon Peterson, Charles R. Hutt
Design concepts for a Global Telemetered Seismograph Network
This study represents a first step in developing an integrated, real-time global seismic data acquisition system a Global Telemetered Seismograph Network (GTSN). The principal objective of the GTSN will be to acquire reliable, high-quality, real-time seismic data for rapid location and analysis of seismic events. A secondary, but important, objective of the GTSN is to augment the existing off-line
Authors
Jon Peterson, Nicholas A. Orsini
Offshore survey of the Pillar Mountain Landslide, Kodiak, Alaska
No abstract available.
Authors
G. W. Moore
3.5-kHz Data Collected in the Wilmington Canyon Area During 1980, Endeavor Cruise 80-EN-056
During 1980, geophysical data were collected seaward of New Jersey in the vicinity of Wilmington Canyon on three cruises, GYRE 80-G-7B, GYRE 80-G-BB, and ENDEAVOR 80-EN-056 (discussed here). The objectives of these surveys of the Continental Slope and upper Rise, including Wilmington Canyon and the adjacent margin, were to extend existing geophysical coverage to the south of Wilmington Canyon and
Authors
B. A. McGregor
High-resolution seismic-reflection profiles from the R/V Columbus Iselin, cruise CI 7-78-2, over the continental shelf and slope in the Georges Bank area
In September 1978, the U. S. Geological Survey (USGS) collected 5,029 km of single-channel seismic-reflection data from the Georges Bank area of the Atlantic Continental Shelf and Slope during the R/V COLUMBUS ISELIN cruise CI 7-78-2. The purpose of the cruise was to determine the location and frequency of mass sediment movement and other geologic hazards along the Continental Slope.Navigation of
Authors
Norman G. Bailey, John M. Aaron
Erosional channels on the shoreface of Nauset Beach, Cape Cod, Massachusetts
Many channels (1 to 3 m relief)_are located offshore of Nauset Beach, Cape Cod, Massachusetts, in water 4 to 18 m deep. The channels are oblique to the shoreline, are spaced approximately 260 m apart, and deepen seaward. The southern flank of each channel is rippled whereas the northern flank and interchannel areas are smooth. The origin of the channels is unknown. They probably formed by erosion
Authors
S. W. Needell, William P. Dillon, H. J. Knebel
Geomagnetic local and regional harmonic analyses
Procedures are developed for using rectangular and cylindrical harmonic analyses in local and regional areas. Both the linear least squares analysis, applicable when component data are available, and the nonlinear least squares analysis, applicable when only total field data are available, are treated. When component data are available, it is advantageous to work with residual fields obtained by s
Authors
L.R. Alldredge
Temporal and spatial variations in suspended matter in continental shelf and slope waters off the north-eastern United States
Seston in waters of Georges Bank originates primarily from biological production and from resuspension of bottom sediments. The concentrations of suspended matter observed on the central shoals are more influenced by storms than by seasonal changes. Winter storms produce highest concentrations of non-combustible material throughout the water column, and summer storms appear to increase biological
Authors
Michael H. Bothner, Carol M. Parmenter, John D. Milliman
Rectangular harmonic analysis applied to the geomagnetic field
Spherical harmonic analysis of the earth's magnetic field is limited in the resolution that can be obtained. This limitation is caused by inadequacies of computers and of available data sets. The fundamental wavelength in spherical harmonic analysis is the circumference of the earth. To resolve wavelengths as short as 100 km would require a spherical harmonic analysis carried out to a degree and o
Authors
L.R. Alldredge
Geodetic measurement of crustal deformation on the San Andreas, Hayward, and Calaveras faults near San Francisco, California
Analysis of a geodetic network of 115 lines crossing the San Andreas, Hayward, and Calaveras faults in the vicinity of San Francisco Bay and measured repeatedly between 1970 and 1980 has revealed details about the accommodation of relative plate motion in this area. The most striking result is that the deformation is not uniformly distributed across the area. In the east bay, along the Hayward and
Authors
W. H. Prescott, Michael Lisowski, James C. Savage